Single-Point Slide Zoom Control via Touch Pressure and Contact Area
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Solution Overview
Problem
Existing electronic devices with touch screens require the use of two hands to perform zooming operations, making it difficult to zoom in or out with a single hand, as they typically necessitate two-finger sliding gestures for page control.
Innovation Solution
An electronic device equipped with a processor that recognizes single-point slide operations on a touch screen, utilizing touch pressure and contact area as feature values to control zooming, allowing zooming based on sliding distance and deflection angles, enabling single-handed zooming through a single-point slide operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two-finger sliding gesture is used for zooming, then zooming control is achieved, but single-handed operation becomes difficult
Solution Approach 1:
The patent segments the zooming operation into two independent components: a single-point slide gesture for controlling zoom direction and magnitude, and a separate pressure/contact area detection for activating and modulating the zoom effect. This segmentation allows the operation to be performed with one hand while maintaining precise control over the zooming behavior.
Solution Approach 2:
The patent introduces a new dimension of interaction by utilizing touch pressure and contact area as additional control parameters beyond the traditional two-dimensional slide gesture. This allows the system to distinguish between different types of single-point slides and to modulate the zooming effect based on the force and area of contact, enabling sophisticated single-handed control without requiring complex multi-finger gestures.
2Measurement precision
If touch pressure and contact area are used as feature values, then single-point slide operation recognition is improved, but processing complexity increases
Solution Approach 1:
The patent performs preliminary classification of touch events by evaluating pressure and contact area thresholds before executing the full zooming operation. By pre-determining whether a single-point slide should trigger zooming based on these feature values, the system avoids unnecessary processing of non-zoom gestures while maintaining high recognition precision for valid zoom operations.
Solution Approach 2:
The patent changes the parameter space of touch input recognition by incorporating pressure and contact area as additional dimensions beyond position and velocity. This allows the system to create more distinct decision boundaries for different gesture types, improving recognition precision while the use of threshold-based evaluation keeps processing complexity manageable.
Data Source
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AI summary
An electronic device and a method for controlling zooming of a displayed object are disclosed. The method includes: receiving a single-point slide operation performed by a user on a displayed object of a touch screen, and generating a slide signal; parsing the slide signal to obtain a slide track and a feature value of the single-point slide operation; determining whether the feature value of at least one point in the single-point slide operation is greater than a preset value; and when the feature value is greater than the preset value, controlling zooming of the displayed object according to the slide track. The present invention, a slide track and a feature value of a single-point slide operation of a user are identified, and when it is determined that the feature value is greater than a preset value, zooming of a displayed object of the touch screen is controlled.